Practice problem
What is the recursive formula of the sequence 8,4,2,1,12,…8, 4, 2, 1, \frac{1}{2}, \dots8,4,2,1,21,…?
an=12an−1a_n = \frac{1}{2a_{n-1}}an=2an−11
an=12ana_n = \frac{1}{2}a_{n}an=21an
an=12an−1a_n = \frac{1}{2}a_{n-1}an=21an−1
an=12an−1a_n = \frac{1}{2}a^{n-1}an=21an−1
Type a concept, like “slope” or “photosynthesis”.
